A 10-year-old California girl has died after she lost consciousness on a roller coaster at Six Flags Magic Mountain in Valencia, KTLA reported Monday.

Jasmine Martinez of Somis reportedly was unconscious but breathing Friday afternoon after she rode the Revolution coaster. She was airlifted to a local hospital, according to the Los Angeles County Fire Department.

At the time, investigators said the incident was not related to the ride's operation, Magic Mountain said.